Question....did you drop the mag before trying to remove the slide. Can you move the slide back or is it locked up totally.
Yeah I just tried, the pin works!!! Just have to stick the end of it in.Try lining up the alignment marks and putting the slide stop back in and cycle the slide several times. Pull the trigger and see if it dry fires, you can't hurt the gun by dry firing it. If it works go ahead and try dissambly again.